kconfig

Linux块设备驱动源码

#
# Block device driver configuration
#

menu "Block devices"

config BLK_DEV_FD
	tristate "Normal floppy disk support"
	depends on ARCH_MAY_HAVE_PC_FDC
	---help---
	  If you want to use the floppy disk drive(s) of your PC under Linux,
	  say Y. Information about this driver, especially important for IBM
	  Thinkpad users, is contained in <file:Documentation/floppy.txt>.
	  That file also contains the location of the Floppy driver FAQ as
	  well as location of the fdutils package used to configure additional
	  parameters of the driver at run time.

	  To compile this driver as a module, choose M here: the
	  module will be called floppy.

config AMIGA_FLOPPY
	tristate "Amiga floppy support"
	depends on AMIGA

config ATARI_FLOPPY
	tristate "Atari floppy support"
	depends on ATARI

config BLK_DEV_SWIM_IOP
	bool "Macintosh IIfx/Quadra 900/Quadra 950 floppy support (EXPERIMENTAL)"
	depends on MAC && EXPERIMENTAL && BROKEN
	help
	  Say Y here to support the SWIM (Super Woz Integrated Machine) IOP
	  floppy controller on the Macintosh IIfx and Quadra 900/950.

config MAC_FLOPPY
	tristate "Support for PowerMac floppy"
	depends on PPC_PMAC && !PPC_PMAC64
	help
	  If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
	  floppy controller, say Y here. Most commonly found in PowerMacs.

config BLK_DEV_PS2
	tristate "PS/2 ESDI hard disk support"
	depends on MCA && MCA_LEGACY && BROKEN
	help
	  Say Y here if you have a PS/2 machine with a MCA bus and an ESDI
	  hard disk.

	  To compile this driver as a module, choose M here: the
	  module will be called ps2esdi.

config AMIGA_Z2RAM
	tristate "Amiga Zorro II ramdisk support"
	depends on ZORRO
	help
	  This enables support for using Chip RAM and Zorro II RAM as a
	  ramdisk or as a swap partition. Say Y if you want to include this
	  driver in the kernel.

	  To compile this driver as a module, choose M here: the
	  module will be called z2ram.

config ATARI_ACSI
	tristate "Atari ACSI support"
	depends on ATARI && BROKEN
	---help---
	  This enables support for the Atari ACSI interface. The driver
	  supports hard disks and CD-ROMs, which have 512-byte sectors, or can
	  be switched to that mode. Due to the ACSI command format, only disks
	  up to 1 GB are supported. Special support for certain ACSI to SCSI
	  adapters, which could relax that, isn't included yet. The ACSI
	  driver is also the basis for certain other drivers for devices
	  attached to the ACSI bus: Atari SLM laser printer, BioNet-100
	  Ethernet, and PAMsNet Ethernet. If you want to use one of these
	  devices, you need ACSI support, too.

	  To compile this driver as a module, choose M here: the
	  module will be called acsi.

comment "Some devices (e.g. CD jukebox) support multiple LUNs"
	depends on ATARI && ATARI_ACSI

config ACSI_MULTI_LUN
	bool "Probe all LUNs on each ACSI device"
	depends on ATARI_ACSI
	help
	  If you have a ACSI device that supports more than one LUN (Logical
	  Unit Number), e.g. a CD jukebox, you should say Y here so that all
	  will be found by the ACSI driver. An ACSI device with multiple LUNs
	  acts logically like multiple ACSI devices. The vast majority of ACSI
	  devices have only one LUN, and so most people can say N here and
	  should in fact do so, because it is safer.

config ATARI_SLM
	tristate "Atari SLM laser printer support"
	depends on ATARI && ATARI_ACSI!=n
	help
	  If you have an Atari SLM laser printer, say Y to include support for
	  it in the kernel. Otherwise, say N. This driver is also available as
	  a module ( = code which can be inserted in and removed from the
	  running kernel whenever you want). The module will be called
	  acsi_slm. Be warned: the driver needs much ST-RAM and can cause
	  problems due to that fact!

config BLK_DEV_XD
	tristate "XT hard disk support"
	depends on ISA && ISA_DMA_API
	help
	  Very old 8 bit hard disk controllers used in the IBM XT computer
	  will be supported if you say Y here.

	  To compile this driver as a module, choose M here: the
	  module will be called xd.

	  It's pretty unlikely that you have one of these: say N.

config PARIDE
	tristate "Parallel port IDE device support"
	depends on PARPORT
	---help---
	  There are many external CD-ROM and disk devices that connect through
	  your computer's parallel port. Most of them are actually IDE devices
	  using a parallel port IDE adapter. This option enables the PARIDE
	  subsystem which contains drivers for many of these external drives.
	  Read <file:Documentation/paride.txt> for more information.

	  If you have said Y to the "Parallel-port support" configuration
	  option, you may share a single port between your printer and other
	  parallel port devices. Answer Y to build PARIDE support into your
	  kernel, or M if you would like to build it as a loadable module. If
	  your parallel port support is in a loadable module, you must build
	  PARIDE as a module. If you built PARIDE support into your kernel,
	  you may still build the individual protocol modules and high-level
	  drivers as loadable modules. If you build this support as a module,
	  it will be called paride.

	  To use the PARIDE support, you must say Y or M here and also to at
	  least one high-level driver (e.g. "Parallel port IDE disks",
	  "Parallel port ATAPI CD-ROMs", "Parallel port ATAPI disks" etc.) and
	  to at least one protocol driver (e.g. "ATEN EH-100 protocol",
	  "MicroSolutions backpack protocol", "DataStor Commuter protocol"
	  etc.).

source "drivers/block/paride/Kconfig"

config BLK_CPQ_DA
	tristate "Compaq SMART2 support"
	depends on PCI
	help
	  This is the driver for Compaq Smart Array controllers.  Everyone
	  using these boards should say Y here.  See the file
	  <file:Documentation/cpqarray.txt> for the current list of boards
	  supported by this driver, and for further information on the use of
	  this driver.

config BLK_CPQ_CISS_DA
	tristate "Compaq Smart Array 5xxx support"
	depends on PCI
	help
	  This is the driver for Compaq Smart Array 5xxx controllers.
	  Everyone using these boards should say Y here.
	  See <file:Documentation/cciss.txt> for the current list of
	  boards supported by this driver, and for further information
	  on the use of this driver.

config CISS_SCSI_TAPE
	bool "SCSI tape drive support for Smart Array 5xxx"
	depends on BLK_CPQ_CISS_DA && SCSI && PROC_FS
	help
	  When enabled (Y), this option allows SCSI tape drives and SCSI medium
	  changers (tape robots) to be accessed via a Compaq 5xxx array 
	  controller.  (See <file:Documentation/cciss.txt> for more details.)

	  "SCSI support" and "SCSI tape support" must also be enabled for this 
	  option to work.

	  When this option is disabled (N), the SCSI portion of the driver 
	  is not compiled.

config BLK_DEV_DAC960
	tristate "Mylex DAC960/DAC1100 PCI RAID Controller support"
	depends on PCI
	help
	  This driver adds support for the Mylex DAC960, AcceleRAID, and
	  eXtremeRAID PCI RAID controllers.  See the file
	  <file:Documentation/README.DAC960> for further information about
	  this driver.

	  To compile this driver as a module, choose M here: the
	  module will be called DAC960.

config BLK_DEV_UMEM
	tristate "Micro Memory MM5415 Battery Backed RAM support (EXPERIMENTAL)"
	depends on PCI && EXPERIMENTAL
	---help---
	  Saying Y here will include support for the MM5415 family of
	  battery backed (Non-volatile) RAM cards.
	  <http://www.umem.com/>

	  The cards appear as block devices that can be partitioned into
	  as many as 15 partitions.

	  To compile this driver as a module, choose M here: the
	  module will be called umem.

	  The umem driver has not yet been allocated a MAJOR number, so
	  one is chosen dynamically.  Use "devfs" or look in /proc/devices
	  for the device number

config BLK_DEV_UBD
	bool "Virtual block device"
	depends on UML
	---help---
          The User-Mode Linux port includes a driver called UBD which will let
          you access arbitrary files on the host computer as block devices.
          Unless you know that you do not need such virtual block devices say
          Y here.

config BLK_DEV_UBD_SYNC
	bool "Always do synchronous disk IO for UBD"
	depends on BLK_DEV_UBD
	---help---
	  Writes to the virtual block device are not immediately written to the
	  host's disk; this may cause problems if, for example, the User-Mode
	  Linux 'Virtual Machine' uses a journalling filesystem and the host
	  computer crashes.

          Synchronous operation (i.e. always writing data to the host's disk
          immediately) is configurable on a per-UBD basis by using a special
          kernel command line option.  Alternatively, you can say Y here to
          turn on synchronous operation by default for all block devices.

          If you're running a journalling file system (like reiserfs, for